<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button
            type="primary"
            @click="addDialogVisible = true"
            @close="addDialogClosed"
          >添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域  -->
      <el-table
        :data="rolesList"
        border
        stripe
      >
        <!-- 展开列 -->
        <el-table-column
          lable="展开列"
          type="expand"
        >
          <!-- 权限操作 -->
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.index"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row,item1.id)"
                >{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' :'bdtop','vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      :class="[i3]"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column
          lable="序号"
          type="index"
        ></el-table-column>
        <el-table-column
          label="角色名称"
          prop="roleName"
        ></el-table-column>
        <el-table-column
          label="角色描述"
          prop="roleDesc"
        ></el-table-column>
        <el-table-column
          label="操作"
          width="300px"
        >
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <!-- 删除按钮 -->
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeUserById(scope.row.id)"
            >删除</el-button>
            <!-- 分配权限按钮 -->
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!--内容主体区 -->
      <el-form
        ref="addFormRef"
        :model="addForm"
        :rules="addFormRoles"
        label-width="100px"
      >
        <el-form-item
          label="角色名称"
          prop="roleName"
        >
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item
          label="角色描述"
          prop="roleDesc"
        >
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <!-- 底部区域 -->
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="addUser"
        >确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改角色对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item
          label="角色名称"
          prop="roleName"
        >
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item
          label="角色描述"
          prop="roleDesc"
        >
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="editUserInfo"
        >确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      >
      </el-tree>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="allotRights"

        >确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
    data () {
        return {
            // 所有角色列表数据
            rolesList: [],
            // 所有权限列表数据
            rightslist: [],
            // 控制添加用户对话框的显示与隐藏
            addDialogVisible: false,
            // 控制显示权限对话框的显示与隐藏
            setRightDialogVisible: false,
            // 树形控件的属性绑定事件
            treeProps: {
              label: 'authName',
              children: 'children'
            },
            // 默认选中的节点ID值数组
            defKeys: [],
            // 当前即将分配权限的角色id
            roleId: [],
                // 添加用户的表单数据
            addForm: {
              roleName: '',
              roleDesc: ''

        },
        // 添加用户表单的验证规则对象
        addFormRoles: {
          roleName: [
           { required: true, message: '请输入角色名', trigger: 'blur' }, {
             min: 2,
             max: 10,
             message: '角色名的长度在2-10个字符之间',
             trigger: 'blur'
          }],
          roleDesc: [
           { required: true, message: '请输入角色描述', trigger: 'blur' }, {
             min: 2,
             max: 14,
             message: '角色名称的长度在2-14个字符之间',
             trigger: 'blur'
          }]

        },
        // 控制修改用户对话框的显示与隐藏
        editDialogVisible: false,
        // 查询用户信息对象
        editForm: {},
        // 表单的验证规则
        editFormRules: {
          roleName: [
           { required: true, message: '请输入合法的角色名称', trigger: 'blur' }, {
             trigger: 'blur'
          }],
          roleDesc: [
           { required: true, message: '请输入合法的角色描述', trigger: 'blur' }, {
             trigger: 'blur'
          }]
        }
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        // 获取所有角色的列表
       async getRolesList () {
           const { data: res } = await this.$http.get('roles')
           if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！')
           }
            this.rolesList = res.data
            console.log(this.rolesList)
        },
        // 根据ID删除对应权限
       async removeRightById (role, rightId) {
              //  弹框提示用户是否删除
              const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning '
              }).catch(err => err)
              if (confirmResult !== 'confirm') {
                return this.$message.info('取消了删除！')
              }
              const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
              if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败！')
              }
              // this.getRolesList()
              role.children = res.data
        },
        // 展示分配权限对话框
       async showSetRightDialog(role) {
         this.roleId = role.id
         const { data: res } = await this.$http.get('rights/tree')
         if (res.meta.status !== 200) {
           return this.$message.error('获取权限数据失败！')
         }
        //  把获取到的权限数据保存到data中
        this.rightslist = res.data
        // console.log(this.rightslist)
          this.getLeafKeys(role, this.defKeys)
          this.setRightDialogVisible = true
          // 递归获取三级节点的id
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
        getLeafKeys(node, arr) {
          // 如果当前node 节点不包含children属性，则是三级节点
          if (!node.children) {
            return arr.push(node.id)
          }
          node.children.forEach(item => this.getLeafKeys(item, arr)
          )
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
          this.defKeys = []
        },
        // 点击为角色分配权限
       async allotRights() {
          const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
          ]
          const idStr = keys.join(',')
         const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
          if (res.meta.status !== 200) {
            return this.$message.error('分配权限失败！')
          }
          this.$message.success('分配权限成功！')
          this.getRolesList()
          this.setRightDialogVisible = false
        },
        // 监听添加用户对话框的关闭事件
        addDialogClosed () {
          this.$refs.addFormRef.resetFields()
        },
        // 点击按钮 添加用户
        addUser () {
          this.$refs.addFormRef.validate(async valid => {
            if (!valid) return
            // 可以发起添加用户的网络请求
            const { data: res } = await this.$http.post('roles', this.addForm)
            if (res.meta.status !== 201) {
              this.$message.error('角色添加失败')
            }
              this.$message.success('角色添加成功')
              this.addDialogVisible = false
              this.getRolesList()
          })
        },
         // 展示编辑角色的对话框
        async showEditDialog (id) {
          const { data: res } = await this.$http.get('roles/' + id)
          if (res.meta.status !== 200) {
            return this.$message.error('查询角色信息列表失败！')
          }
          this.editForm = res.data
          this.editDialogVisible = true
          console.log(res)
        },
        // 监听修改角色对话框的关闭事件
        editDialogClosed () {
          this.$refs.editFormRef.resetFields()
        },
        // 修改角色信息并提交
        editUserInfo() {
          this.$refs.editFormRef.validate(async valid => {
            if (!valid) return
            // 发起修改角色信息的数据请求
            const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
              roleName: this.editForm.roleName,
              roleDesc: this.editForm.roleDesc
            })
            if (res.meta.status !== 200) {
              return this.$message.error('更新角色信息失败！')
            }
            // 关闭对话框
            this.editDialogVisible = false
            // 刷新数据列表
            this.getRolesList()
            // 提示修改信息
            this.$message.success('更新角色信息成功！')
          })
        },
        // 根据ID删除对应的角色信息
        async removeUserById(id) {
          // console.log(id)
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示',
            {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning'
              }).catch(err => err)
              // 如果用户确认删除，则返回值为字符串 confirm
              // 如果用户取消了删除，则返回值为字符串 cancel
              if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
              }
              const { data: res } = await this.$http.delete('roles/' + id)
              if (res.meta.status !== 200) {
                return this.$message.error('删除用户失败！')
              }
              this.getRolesList()
              this.$message.success('删除用户成功！')
              }
        }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;

}
.vcenter{
  display: flex;
  align-items: center;
}

</style>
